Robert wishes that he（)business instead of history when he was in university.

A.圆锥隔型

B.膜周型

C.肌部型

D.室上嵴下型

E.双动脉干下型

A.美国科学家Stanley Prusiner从感染羊瘙痒病的鼠脑中分离出朊粒

B.德国科学家Emil von Behring制成白喉抗毒素血清并建立血清治疗感染性疾病的方法

C.德国科学家Robert Koch分离和鉴定结核分枝杆菌并提出确定疾病的病原微生物的郭霍法则

D.英国科学家Alexader Fleming发现青霉素及其抗菌作用

E.澳大利亚科学家Barry J Marshall从胃炎和胃溃疡组织标本中分离出幽门螺杆菌，并证实其是消化道溃疡及胃炎的病原菌

F.美国科学家Baruch Blumberg发现"肝炎相关抗原"，后证实为乙型肝炎病毒的表面抗原

G.美国科学家Kary Mulis创立PCR技术

H.德国科学家Harald Zur Hausen发现人乳头瘤病毒(HPV)是宫颈癌的病原微生物

I.法国科学家Francoise Barre-Sinous

A.obvious

B.persuasive

C.severe

D.contrary

Jack wishes that he ___________ business instead of history when he was in university.

A) studied B) study C) had been studying D) had studied

v

A.the

B.an

C.a

D./

A. with

B. in

C. by

D. at